Monitor arm



FIG. 1 is an isometric view of the monitor arm embodying the new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines are directed to environment. The broken lines form nopart of the claimed design.

CLAIM The ornamental design for a monitor arm, as shown and described.